Although partially off-topic, I’ve always wondered about the resolution of our eyes. I never got to researching it at any depth, but it’s one of those recurring questions I’d have while waiting in line somewhere or driving. Beyond that, I also wondered what the ‘refresh rate’ of our eye was. These two questions would kind of stop at my realization that there are things that are ‘too small to be seen by the naked eye’ and that objects can move ‘faster than the naked eye’ so that said, there must be both resolution and ‘refresh rate’ limits in place.
This article doesn’t cover much about the refresh rate question I still have, but has tons of information about the human eye.